UV/SPC体系降解对乙酰氨基酚的效能及机制  

Performance and Mechanism of UV/SPC System for Degradation of Acetaminophen

作　　者：王金晓 郑伟杰 许荣刚 罗从伟[1,4] 武道吉[1,4] 张新玉 成小翔 许兵[1] 任会学[1] 陈飞勇 WANG Jin‑xiao;ZHENG Wei‑jie;XU Rong‑gang;LUO Cong‑wei;WU Dao‑ji;ZHANG Xin‑yu;CHENG Xiao‑xiang;XU Bing;REN Hui‑xue;CHEN Fei‑yong(School of Municipal and Environmental Engineering,Shandong Jianzhu University,Jinan 250101,China;Jinan Municipal Engineering Design and Research InstituteCo.Ltd.,Jinan 250101,China;Tongyuan Desgin Group Co.Ltd.,Jinan 250101,China;Institute of Resources and Environment Innovation,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学市政与环境工程学院,山东济南250101 [2]济南市市政工程设计研究院<集团>有限责任公司,山东济南250101 [3]同圆设计集团股份有限公司,山东济南250101 [4]山东建筑大学资源与环境创新研究院,山东济南250101

出　　处：《中国给水排水》2024年第7期65-72,共8页China Water & Wastewater

基　　金：山东省重点研发计划(重大科技创新工程)项目(2023CSGC010904);国家自然科学基金资助面上项目(52270200);山东省高等学校“青创科技计划”项目(2023KJ125);山东省引进顶尖人才“一事一议”项目(0031504)。

摘　　要：利用紫外催化过碳酸钠(SPC)降解对乙酰氨基酚(APAP),并探究降解效能及机理。结果表明,在pH=7、APAP初始浓度为10μmol/L、SPC浓度为2 mmol/L的条件下,反应60 min后对APAP的去除率达到100%。自由基淬灭实验和电子自旋共振(ESR)检测证明,UV/SPC体系中降解APAP的主要活性物质是·OH和CO_(3)^(·-),其贡献率分别为61.5%和38.5%。在优化实验参数过程中发现,适当增加SPC的浓度和降低反应的pH能有效促进APAP的降解,但天然有机物(NOM)和HCO_(3)^(-)会抑制APAP的降解。通过气相色谱串联质谱(GC-MS/MS)测定出13种APAP的降解产物,推测APAP主要通过电子转移、夺氢反应、取代反应等方式被逐步降解。TOC检测结果表明,UV/SPC体系矿化程度低,导致大量中间产物积累。急性毒性实验表明,APAP在降解过程中毒性增强。The performance and mechanism of UV‑catalyzed sodium percarbonate(SPC)for degrading acetaminophen(APAP)were investigated.The removal rate of APAP reached 100%after 60 min of reaction when the pH,initial APAP concentration and SPC concentration were 7,10μmol/L and 2 mmol/L,respectively.The free radical quenching experiment and electron spin resonance(ESR)detection showed that the main active substances for degrading APAP in the UV/SPC system were·OH and CO_(3)^(·-),and their contribution rates were 61.5%and 38.5%,respectively.The optimization experiment indicated that appropriately increasing the concentration of SPC and decreasing the pH of the reaction could effectively promote the degradation of APAP.However,natural organic matter(NOM)and HCO_(3)^(-)inhibited the degradation of APAP.Thirteen degradation products of APAP were determined by gas chromatography‑tandem mass spectrometry(GC‑MS/MS).It was speculated that APAP was gradually degraded by the pathways such as electron transfer,hydrogen atom abstraction and substitution reaction.The detection of TOC indicated that the mineralization degree of the UV/SPC system was low,resulting in the accumulation of a large number of intermediate products.The acute toxicity experiments indicated that the toxicity of APAP increased during degradation.

关 键 词：过碳酸钠 对乙酰氨基酚 降解效能 急性毒性 

分 类 号：TU992[建筑科学—市政工程]